Calipers



JESSE E. CLARK, 01's MOUNTAINVIEW, WYOMING.

CALIPERS.

Specification of Letters Patent.

, Patented Mar. 1, 1921.

Application filed August 6, 1920. Serial No. 401,649.

To all whom it may concern Be it known that I, Jnssn E. CLARK, a citizen of the United States, residing at Mountainview, in the county of Ulnta and State of Wyoming, have invented certain new and useful Improvements in Calipers, of which the following is a specification.

This invention relates to calipers such as used by blacksmiths and Others; and it con sists in the novel construction and combination of the parts hereinafter fully described and claimed whereby the same tool can be used as inside calipers, outside calipers, and as dividers.

In the drawings, Figure 1 is a front vlew of calipers constructed according to this invention. Fig.2 is a side view of the same.

The main shanks 3 of the calipers are pivoted together by a pivot pin 4, and are pressed apart by means of a spring :2 which engages with notches 5 in the upper end portions 6 of the shanks. The shanks are pressed toward each other by means of a screw 7 which projects from a lug 8 pivoted to one shank. This screw slides in a hole in a guide lug 9 pivoted to the other shank, and a nut 10 is screwed on the screw and presses a washer 12 against the guide lug 9 when turned by hand to move the shanks toward each other. This arrangement for pivotally connecting and operating the shanks is of approved construction, and it may be variously modified in carrying out this invention.

In order to adapt the calipers for diiferent uses, the middle parts of the shanks have curved portions 14: which project in opposite directions, and the lower and free end portions of the shanks are straight rods 15 which are arranged in line with the upper and pivoted parts of the shanks. The parts 16 between the lower ends of the curved portions 14E form the jaws of the out side calipers, and the projecting rods 15 are not found to be in'the way or to make the tool inconvenient for use in connection with the work ordinarily undertaken by blacksmiths.

The lower end portions of the rods 15 have lateral projections 17 which fit them for use as inside calipers; and the extreme ends of the rods 15 have sharp points 18 which enable the tool to be used as dividers which can beset to engage with punch marks on the work, and which are very necessary to a blacksmith.

There is a great convenience in having these three tools combined together, as when formed separately one or the other of the tools is frequently misplaced and cannot be found quickly when wanted.

What I claim is:

Atool of the character described, comprising two shanks having straight upper end portions which are pivoted together, said shanks having curved middle parts which tions and are used as outside calipers, said shanks having their free end and lower parts formed of two straight rods arranged in line with their upper and pivoted portions, said rods having lateral projecting end portions which are used as inside calipers, and having also points at their extreme ends which are used as dividers.

In testimony whereof I have aflixed my signature.

JESSE E. CLARK.

project outwardly in opposite direc- 

